# Error During Creation of PYNQ SD Related to gcc-mb build

**URL:** <https://discuss.pynq.io/t/error-during-creation-of-pynq-sd-related-to-gcc-mb-build/3112>\
**Category:** Support\
**Created:** [October 7, 2021, 9:49am UTC](https://discuss.pynq.io/t/error-during-creation-of-pynq-sd-related-to-gcc-mb-build/3112 "2021-10-07T09:49:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ATchelet](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/atchelet/32/2439_2.png) [@ATchelet](https://discuss.pynq.io/u/ATchelet)\
**Post date:** [October 7, 2021, 9:49am UTC](https://discuss.pynq.io/t/error-during-creation-of-pynq-sd-related-to-gcc-mb-build/3112/1 "2021-10-07T09:49:42Z")

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I’m trying to create an SD image for the ZCU102 board, but the MAKE process fails because it can’t download isl-0.20.tar.xz from [http://isl.gforge.inria.fr](http://isl.gforge.inria.fr) .  
I had a look and this server is indeed unavailable. I found a mirror here: [http://mirror.sobukus.de/files/src/isl/isl-0.20.tar.gz](http://mirror.sobukus.de/files/src/isl/isl-0.20.tar.gz) but as the config file is being generated or Imported during the MAKE run, modifying CT\_ISL\_MIRRORS in sdbuild/build/gcc-mb is futile.

I’m using 2020.1 Xilinx tools with PYNQ 2.6

I’m going to attach the log in a comment as I’m limited to 2 links due to being a new member

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**Author:** ![ATchelet](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/atchelet/32/2439_2.png) [@ATchelet](https://discuss.pynq.io/u/ATchelet)\
**Post date:** [October 7, 2021, 10:01am UTC](https://discuss.pynq.io/t/error-during-creation-of-pynq-sd-related-to-gcc-mb-build/3112/2 "2021-10-07T10:01:29Z")

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Here is the log file from sdbuild/build/gcc-mb/build.log (attached as a file due to links limitation). The relevant log starts from line 1667 of the file.[build.log](https://discuss.pynq.io/uploads/short-url/3wNrMi8jLG16wGfU1DYo7hpU3o2.log) (96.3 KB)

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<div class="post-metadata">

**Author:** ![ATchelet](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/atchelet/32/2439_2.png) [@ATchelet](https://discuss.pynq.io/u/ATchelet)\
**Post date:** [October 7, 2021, 3:31pm UTC](https://discuss.pynq.io/t/error-during-creation-of-pynq-sd-related-to-gcc-mb-build/3112/3 "2021-10-07T15:31:37Z")

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Managed to solve it by manually downloading and placing isl-0.20.tar.gz and isl-0.20.tar.xz from [http://mirror.sobukus.de/files/src/isl/](http://mirror.sobukus.de/files/src/isl/) to PYNQ/sdbuild/gcc-mb/.build/tarballs

Hope it will help someone in the future